Grate



E. B. WOOLSTON. GRATE. .317. Patented Oct. 8, 1889.

(No Model.)

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UNITED STATES PATENT Prion.

ELIJAH B. I'VOOLSTON, OF CROPI VELL, NEW JERSEY.

GRATE.

SPECIFIGATIDN forming part of Letters Patent No. 412,317, dated October8, 1889. Application filed May 22, 1889. fierial No. 311,740. (Nomodel.)

To all whom it may concern.-

Be it known that I, ELIJAI-I B. WVOOLSTON, a citizen of the UnitedStates, residing at Oropwell, in the county of Camden and State of NewJersey, have invented certain new and useful Improvements in Grates; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to grates for the firepots of stoves, furnaces,heaters, ranges, and similar devices.

The object I have in view is to provide a simple and novel device bywhich an intense heat is produced with less fuel and with better efiectthan with the grates hitherto in use.

"With these ends in View my invention con-.

sists in the novel features and combinations of parts more fullydescribed hereinafter, and pointed out in the claims.

Referring to the accompanying drawings, Figure 1 represents a sectionalelevation of my device; Fig. 2, a plan with the cylinder removed, andFig. 3 a detail view of the cylinder.

The reference-letter 0, represents a circular grate having its rear half0 cast integral with the rim 7), and its front section (1, whichcompletes the opposite half, removably hung within the rim by means ofthe trunnions e. A central hot-air cylinder or flue f, of any convenientheight or size, is seated upon the inner concentric ring g, and issecured to' the rigid rear half 0 of the grate by means of thesemicircular flange h. The vertical walls of this cylinder arecompletely closed, and without perforations or apertures of any kind,whereby an uninterrupted draft is made to ascend directly through it. Inthe top of the central hot-air cylinder f is removably seated an uppergrate 2', which is hinged upon the trunnions j, bearing upon the rim 7a.

The lower grate, the central hot-air cylinand the upper grate, whenarranged and constructed as described, may be placed within thefire-chamber formed by the wall Z, of almost any ordinary deviceintended for heating or similar purposes. The front sec tion may be usedas a drop-grate, and is held in elevated adjustment by the bolt m, whichbolt will release it and permit it to be dropped when withdrawn.

In using my improved grate the fuel when introduced into theheating-chamber will be distributed around and over the hot-aircylinder, and thereby thrown in closer proximity to the outer walll ofthe chamber, so thatthe heat generated from the fuel will be morethoroughly radiated from the exterior of the heater; and also by thusmaking or creating a hot-air cylinder in the center of the bulk ofignited fuel, and having this hot-air cylinder completely covered withburning fuel, the current of air in passing up through this hot chamberbecomes heated in the same degree as the chamber itself, and in itsupward passage through the hot fuel in a rapid state of combustionnearer the upper half of the stove is still more heated to the samedegree as the ignited fuel through which it passes, while at the sametime a peculiar effect is produced upon the hot-air currents within thehot-air chamber as to produce heat in a less time and of a higherthermometric measure.

My device might be altered in many slight ways which might suggestthemselves to one skilled in the art; hence I do not limit myself to theexact construction herein shown.

But having thus shown the preferred manner of constructing my invention,what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the fire-pot of a stove or similar device, of agrate consisting in alower portion composed of a rigid and drop sectionhaving a central opening common to both sections, a vertical cylinderhaving closed vertical walls, and an open bottom registering with saidcentral opening, and a removable grate in the top of the cylinder, allarranged and adapted to operate in the manner and for the purposesubstantially as described.

2. The combination, with the fire-pot of a stove or similar device, of agrate composed of a rigid and drop section having a central openingcommon to both, a vertical cylinder resting upon and secured to therigid section and registering with said central opening,

and a removable grate seated in the top of the cylinder, all arrangedand adapted V to operate as described.

3. In a grate for stoves and similar devices,

5 a lower portion composed of a rigid and drop section having a centralopening common to both, avertical cylinder resting upon and secured tothe rigid section and surrounding said central opening, said cylinderhaving closed I0 vertical Walls, in combination with a removable gratelocated in the upper part of the cylinder, in the manner and for thepurpose substantially as described.

In testimony whereof I aflix my signature in the presence of twoWitnesses.

ELIJ AH B. WOOLSTON.

